Apr 24, 2013 - Chevron racked up another successful exploration well off Western Australia. The Elfin-1 well is the company's 21st discovery in the region since mid-2009. Drilled by the Atwood Osprey (UDW semisub), the well intercepted 132-feet of net gas pay in the upper Mungaroo sands. Elfin-1 was drilled to a total depth of 11,909 in permit area WA-268-P. Water depth at the location is 3,570 feet. Chevron Australia is the operator and 50% owner of WA-268-P. Its partners, Shell Development Australia and Mobil Australia Resources, hold 25% interest each.